Gas-controlling mechanism for instantaneous water-heaters.



y W J. ELLIS. GAS CONTROLLING MECHANISM FOP INSTANTANEOUS WATER HEATERS.

' APELIOATiON'FILED MAR, 20. 1912.

' (fl 7 1 053 9 Patented Feb. 18, 1913,

' 2 SHEETS-SHEET 1.

J. ELLIS. GAS CONTROLLING MECHANISM FOR INS-TANTANEOUS WATER HEATERS.

APELIOATION FILED MAIL-'20, 1912. 1,053,369..

W/i TER PRES. 646 VA LVE.

.Tllllll WATER VALVE WITH Essa; f

JOHN ELLIS, OF PITTSBURGH, PENNSYLVANIA.

GAS-CONTROLLING MECHANISM FOR INsTANrANEoi-Is wn'rnn-nnarnns.

Specification of Letters Patent.

Patented Feb. 18, 191 3.

Application filed March 20, 1912. Serial Ive-684,960.

To all whom it may concern is it known that I, JOHN ELLIS, a citizen of the United States, residing at Pittsburgh, in the county of Allegheny and State 5 of Pennsylvania, have invented a new and useful Improvement in Gas-Controlling lilechanism for Instantaneous Water-Heaters, of which improvement the following is a specification.

mostat and gas valve controlled thereby.

The object of my invention is to, improve prevent accidental displacement of and tampering with the necessary delicately rid-,1

tion with the'gas valvel lVit-h the above objects in view, the invention consists in certain novel "features of construction, and in certain parts, improve ments, and combinations of parts as will be hereinafter more fully pointed out in the appended ,claiihs.

One embodiment of the invention is illustrated in the accompanying drawings,form-' ing a part of this specification, each .detail part of thestructure.beingfgiveii and referred to by its individual reference numeral throughout the seVe-ralviews where in they appear, said views representing the following: A

'Figure 1 is I tional elevationthrough'the chamber disclosing the working partsltherein. Fig. 2

is a plan, on the line X-X of Fig. 1, of the lower section of the chamber. Fig. 8, is an end elevation of the lower section. Fig, 4 is adside elevation showing the application of theQchamber to the the heater, said parts being shown in dotted lines' In detail, the improvement consists of a casing formed'of the two parts 1 and2, respectively, each, containing a chamber, the upper part'havingarranged therein a disk valve 3 held upon its seat about the communicating opening 4:, betweenthe chambers, by a spiral spring 5 interposed My invention relates to automatic instan-' taneous water heaters, relating in part1cu-' lar to the mechanism intermediate the therthe above mechanism and provide'meansto' djust-ing the parts therein. is to dispense with stuffing boxes as is usually employed in conne described anda longitiidinal or side see,

other parts of.-

-cally disposed portion 8 thrust gages at its forward end with a projected port-ion formed upon the underside of the disk valve and is provided at its,

the screw cap 6 and valve and surrounding the downwardly projected guide 6' of the cap and the valve stem engaging therein, said upper chamber casing-portion having an opening formedthereth'roughwithin the extended and threaded boss 1 by which that portion-of the, chamber is connected to-the gas cock in the line from the heater burner. The lower chamber casing 2 is connected by its threaded boss Qto the water jacket and the thermostat tube therein inclosing the.

thermostat actuated rod 7,

which rod projects into the chamber,

.and is further con-' nected, by its open boss 2, to and communicates with the pipe leading from and connected with .the water valvein the gas line. i VVit-hin the lower chamber is arranged the mechanism or communicating movement from the thermostat-rod to the gas valve in the upper chamber, comprising the horizontally disposed thrust pin ,8 having a vertiat its rear engaging with the end of the thermostat rod,and a base guide portion 8" where it rests upon the lower wall of the chamber, said thrust pin terminating in a point. A verticall disposed lever rest 9 is arranged within the rear of the chamber, is forked atits upper end and provided 'at pressure actuated at a point below the axial line of the thrust pin, said lever rest being further provided with a transversely disposed knife-edge fulcrum rib 9' in front, at a point above the axial line of the pin. .A vertically disposed primary lever 10 is interposed between the thrust pin and lever'rest, with the point of the pin engaging the rest in the small conical opena ing l0in the face thereof, the upper end of.

its lower rear portion w th. a transverse ml) 9' said lever being rounded and extends up be;

tween the forked "portion of the'lever rest? A'horizontally disposed secondary leveren; downwardly rear. end, where it extends through the further provided with a downwardly extended portion 11" in eiigagement withthe.

upper end of the primary lever.

1-W1thin the rear wall of the lower her, near the base,'is fitted a screw-plug 12 which engages supply, then uponcooling of the water in.

valve from its seat,

the transverse rib portion 9' of the lever rest, serving to adjust and take up the slack between the said rest, the primary lever, the thrust-pin and the thermostat rod, a jam nut 13 being arranged on the screw-plug for securing it inadjusted position. A small set screw 14 is also arranged within the rear wall of the chamber, forming an abutment for and serving to regulate the temperature by adjusting the upper end of the lever rest and lever mechanism, which screw is provided with a jam nut 15 to secure it in adjusted position. 7

Assuming that the water in the heater has reached a sufficiently high temperature that the gas valve has been seated bythe spring 5, as shown in Fig. 1, cutting off the gas the heater the operation of opening the valve would be as follows: The thermostat tube in contracting, pushes the rod 7 toward the chamber, causing a like movement of the thrust pin 8 which acts upon the primary lever 10, the upper end of said lever acting upon the secondary lever causes its free end to elevate and raise the gas thus permitting the gas to flow through the chamber, the spring 5 returning the gas valve to its seat when the temperature of the water has again sufficiently increased.

'By providing a chamber within the gas line, and inclosingthegas valve and mechanism therein, no stuffingbox is required for the valve stem, and the parts for operating the valve from the thermostat rod not requiring connection with one another, and

being loosely disposed within the chamber are easily and quickly assembled, cannot become displaced or disarranged and readily adjusted from the exterior when desired.

Having shown and described my inven-' tion, I claim:

-1. In an instantaneous water heater, the combination of a chamber in the gas line,

a thermostat rod projecting from said tube into said chamber, a gas controlling valve in thermostat rod, a primary scribing witnesses.

said chamber, a seating spring engaging said valve, a lever rest loosely seated in said chamber, a primary lever fulcrumed upon said rest and adapted to be operated by the thermostat -rod, and a secondary valve-raising lever fulcrum upon said rest and operated by said primary lever.

2. In an instantaneous water heater, the combination of a chamber in the gas line, a thermostat tube connected thereto, a thermostat rod projecting from said tube into said chamber, a gas controlling valve in said chamber, a seating spring engagin said valve, a thrust pin operated by sai lever operated by said thrust pin, a lever rest loosely seated in said chamber and having said primary lever fulcrumed thereon, a secondary valve raising lever also fulcrumed upon said rest and operated by said primary lever, and screws extending into said chamber engaging said rest for adjusting the temperature and taking up the slack between the levers, the thrust pin and thermostat rod.

3..In an instantaneous Water heater, the combination of a chamber in the gas line, a thermostat tube connected thereto, a ther mostatrod projecting fromsaid tube'into said chamber, a gas-controlling valve in said chamber, a spring for seating the same, a thrust pin operated bysaid thermostat rod, a primary lever operated by said thrust pin, a lever rest loosely seated in'said chamber and having said primary lever fulcrumed thereon, a secondary valve-raising lever also fulcrumed upon said rest and operated, by said primary lever, and screws extending into said chamber engaging said Q rest for adjusting the temperature and taking up the slack thrust pin and thermostat rod.

In testimony whereof, I have hereunto signed my name in the presence of two sub- JOHN ELLIS In the presence of-' JNo. P. REINECKE,

R. SCPI'IA'RRISON.

between the levers, the 

